| IMInnovations Manufacturing INC | Redding | CA | — | ◐ LIKELY ACTIVE |
| IAInnovative Aspects LLC | Houston | TX | — | ▲ REPORTED CLOSED |
| IEInnovative Engineered Solutions | Wilmington | OH | 20–99 | ◐ LIKELY ACTIVE |
Innovative Industries, Inc Kempster | Deerbrook | WI | 1–19 | ◐ LIKELY ACTIVE |
| IMInnovative Mechanical Solutions LLC- IMECH | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| IQInnovative Quality Solutions, LLC | Grandview | MO | — | ◐ LIKELY ACTIVE |
| IDInrock Drilling Systems | Houston | TX | 20–99 | ◐ LIKELY ACTIVE |
| ICInsingerMachine Company | Philadelphia | PA | 20–99 | ◐ LIKELY ACTIVE |
| IEInstitutional Equipment INC | Bolingbrook | IL | — | ◐ LIKELY ACTIVE |
| INInteger N2 Surface Technologies | Woonsocket | MA | 20–99 | ◐ LIKELY ACTIVE |
| IQInteger, QKP | Quakertown | PA | 100–499 | ◐ LIKELY ACTIVE |
| IFIntegral Fabrication & Engineering, LLC | Orlando | FL | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining CO | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IMIntegrated Machining Solutions INC | Norwalk | CA | — | ◐ LIKELY ACTIVE |
| IMIntegrated Manufacturing West Jefferson NC | West Jefferson | NC | 100–499 | ◐ LIKELY ACTIVE |
| IPIntegrated Packaging Machinery | Rockford | MI | 100–499 | ◐ LIKELY ACTIVE |
| IPIntegrated Power Services Liberty OH Service Center | Liberty Township | OH | 1–19 | ◐ LIKELY ACTIVE |
| IPIntegrated Power Services Switchgear Solutions Service Center | Tucson | AZ | 20–99 | ◐ LIKELY ACTIVE |
| IIIntegration INC | Albuquerque | NM | — | ◐ LIKELY ACTIVE |
| IIIntegricoat, INC. | Spring Lake | MI | — | ◐ LIKELY ACTIVE |
| IEIntegrity Engineering Holding, Inc | Ramsey | MN | 20–99 | ◐ LIKELY ACTIVE |
| IMIntegrity Machining, INC | Augusta | IL | — | ◐ LIKELY ACTIVE |
| IMIntegrity Manufacturing CORP | Dayton | OH | — | ◐ LIKELY ACTIVE |
| ITIntegrity Tank Service, LLC | Henderson | KY | 1–19 | ◐ LIKELY ACTIVE |
| ITIntegrity Tool INC | Batesville | IN | — | ◐ LIKELY ACTIVE |
| ITIntegrity Tool & Supply CO | Horsham | PA | — | ◐ LIKELY ACTIVE |
| IVIntellectual Ventures Property Holdings LLC | Bellevue | WA | — | ◐ LIKELY ACTIVE |
| ISIntellifab Solutions LLC | Atlanta | GA | — | ◐ LIKELY ACTIVE |
| ICIntelligent Composites LLC | Milwaukee | WI | — | ◐ LIKELY ACTIVE |
| IIIntercept Industries, Ltd | Spirit Lake | IA | 1–19 | ◐ LIKELY ACTIVE |
| IIIntercept Industries, Ltd. | Tanner | AL | 1–19 | ◐ LIKELY ACTIVE |
| ICInter-city Contracting, INC | Smithfield | RI | — | ◐ LIKELY ACTIVE |
| IMInter-city Manufacturing, INC. | Seaside | CA | — | ◐ LIKELY ACTIVE |
| IMInterconnection Marketing ,inc. | Canoga Park | CA | — | ◐ LIKELY ACTIVE |
| IAInternational Automated Systems INC | Baldwin | WI | — | ◐ LIKELY ACTIVE |
| IAInternational Automated Systems INC | Andover | MN | — | ◐ LIKELY ACTIVE |
International Computer Appliances Corporation | Minneapolis | MN | 100–499 | ◐ LIKELY ACTIVE |
| IQInternational Quality Advantage LLC | Windsor Mill | MD | — | ◐ LIKELY ACTIVE |
International Tool and Manufacturing, INC | Fairfield | NJ | — | ◐ LIKELY ACTIVE |
| ICInterplanetary Concepts, LLC | New Smyrna Beach | FL | — | ◐ LIKELY ACTIVE |
| IAInterroll Atlanta, LLC | Hiram | GA | 100–499 | ◐ LIKELY ACTIVE |
| IMIntertech Medical, LLC | Denver | CO | 20–99 | ◐ LIKELY ACTIVE |
| ICIntra Corporation (1/1/2025-6/30/2025) | Westland | MI | 100–499 | ◐ LIKELY ACTIVE |
| ISIntralox Sparrows Point | Rdgemere | MD | 100–499 | ◐ LIKELY ACTIVE |
| IMIntramotev Main Office | Saint Louis | MO | 20–99 | ◐ LIKELY ACTIVE |
| ILInventive, LLC | Mountain Home | ID | 20–99 | ◐ LIKELY ACTIVE |
| ICInvicta Contracting LLC | Osburn | ID | — | ◐ LIKELY ACTIVE |
| IBIonbond - Beachwood | Beachwood | OH | 20–99 | ◐ LIKELY ACTIVE |
| ICIonbond - Chicago | West Chicago | IL | 20–99 | ◐ LIKELY ACTIVE |
| IDIonbond - Duncan | Duncan | SC | 20–99 | ◐ LIKELY ACTIVE |